The Listening and Pronunciation Page

Listening
Free easy podcasts: http://www.eslpod.com/website/index.php
CBC Radio: http://www.cbc.ca/radio/

If you want to hear some different accents and types of English, try these links too.
BBC Radio: http://www.bbc.co.uk/radio/
Radio Australia: http://www.abc.net.au/radio/listenlive.htm

There are also some English lessons on Radio Australia: http://www.radioaustralia.net.au/
Radio New Zealand: http://www.radionz.co.nz/audio

Pronunciation
This site has American and British vowel sounds
http://hctv.humnet.ucla.edu/departments/linguistics/VowelsandConsonants/course/chapter4/4vowels.html

The Merriam-Webster dictionary lets you hear the words too
http://www.merriam-webster.com/

Syllables
http://www.bbc.co.uk/skillswise/words/spelling/soundandspell/syllables/index.shtml